The presence of a number of compounds such as silicon oxide and titanium in bauxite is considered to be one of the most important factors in reducing the quality and poor quality of refractory products. In this study, the possibility of recovering and extracting these compounds and increasing the Al2O3 / SiO2 modulus in Shahid Nilchian boxing mine in Chaharmahal and Bakhtiari province has been investigated using reverse flotation method. In this study, among the factors affecting the flotation process, three factors of pH, type and amount of collector and arrester have been selected and studied. Talc alkaline amine has been used as a collector and tannic acid as a deterrent and dispersant. Using this method, the amount of titanium compounds and Al2O3 / SiO2 module has been significantly reduced and increased, respectively. Among the three factors studied, pH is the most effective factor in the effectiveness of bauxite flotation.